WP7 should display all Google Calendars on your account like it does for Hotmail.

Pleas add Sync-Option for more Days as 2 Weeks into the calendar. After Sync with Exchange only the last 2 weeks stay in the calendar

Currently, calendar reminder alerts only use a single alert tone. This is not configurable. It can either be turned on or off.

how is it possible that we should have to point out the need for weeknumbers in a calender

Integration of exchange calendar categories with different colors to have the same view like in Outlook.

Add a setting to allow a user to turn off (or change) default reminders for calendar events (currently 15 mins).

The calendar application needs to be opened up as a hub so that other applications can publish their wares into it. for instance”. I use

Add a custom setting so the user can pick how long ahead of time to be reminded for an event. I often need this to be set at odd times so I can allow for different driving times to be at my next appointment.

Creating a meeting invite on the phone is like shooting in the dark since I can't look at particpants free\busy information form exchange.

I love having multiple calendars aggregated on my phone, but in some cases I don't need reminders to fire (e.g. I like seeing my wife's calendar, but I don't need to be reminded throughout the day of her activities)

Let the user customize the Live-Tile. For example:
1. Show the next X Appointments (textually)
2. Show Appointments within the current week (grafically)
3. Show Appointments withín the next X days (grafically)
4. Show a month-overview (without Appointments as there Live-Tiles isn't large enough), but with the current day and weekdays for all days of the month.

Let the user decide via Calendar-Settings which Live-Tile-View he prefers. :-)

I would like to see more selections between 1 hour and 18 hours, such as 90 minutes or even have scrolling hour/minute selection.

I need to scheudle a recurring appointment every 3 weeks.